[PATCH] Add ignore f/m group flags for compatibility

[Arthur]

Move a lot of flags to http://reviews.llvm.org/D4565, Make this revision depend upon http://reviews.llvm.org/D4565, and fixes some problems.

http://reviews.llvm.org/D4570

Files:
  include/clang/Driver/Options.td
  test/Driver/clang_f_opts.c
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